YOU SAID:
Youth swiftly fled; adulthood was mine own.
INTO JAPANESE
青春はあっという間に過ぎ去り、大人の時代が私のものになりました。
BACK INTO ENGLISH
Youth passed in the blink of an eye and adulthood became mine.
INTO JAPANESE
青春時代は瞬く間に過ぎ去り、大人になってしまいました。
BACK INTO ENGLISH
My youth passed in the blink of an eye and I became an adult.
INTO JAPANESE
あっという間に青春時代が過ぎ去り、私は大人になりました。
BACK INTO ENGLISH
My youth passed in the blink of an eye and I became an adult.
Come on, you can do better than that.